<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../js/vue.js"></script>
</head>

<body>
</body>
<script>
    var vm = new Vue({
    el:"#app",
    data:{
        val:"简单对象初始值",
        obj:{
            name:"复杂对象name",
            value:"复杂对象value",
        }
    },
    watch:{
        //watch监听器监听的值对应的函数的参数可加可不加,看需要
        val:function(newval,oldval){
            console.log(newval,oldval);
            console.log(this.val)
        },
        //对于复杂对象的监听方式
        obj:{
            deep:true,
            handler:function(new_val,old_val){
                console.log(new_val,old_val)
            }
        }
    }
})
</script>
</html>
